Lifeboat Foundation

High dark current can significantly impair the performance of infrared photodetectors, devices that can detect photons in the form of infrared radiation. For many years, most solutions for blocking dark current used the electric field inside the detectors.

Researchers at the Chinese Academy of Sciences recently devised an alternative solution to suppress dark current in photodetectors, which is based on the use of van der Waals (vdW) heterostructures. In a paper published in Nature Electronics, they presented visible and mid-wavelength infrared unipolar barrier photodetectors made of band-engineered vdW heterostructures.

“Since Bell Labs produced the Si-based PN junction in 1935, using the built-in electric field in the depletion region has become the main technical route to block dark current,” Weida Hu and Peng Zhou, two of the researchers who carried out the study, told Tech Xplore via email. “In traditional PN junctional infrared photodetectors, the high Shockley-read-Hall (SRH) recombination and surface recombination in the depletion region seriously limit the suppression of dark current. In response to these issues, engineers introduced a new device structure beyond the PN junction, namely the unipolar barrier structure.”

Objectives This study sought to assess the association between long working hours, psychosocial safety climate (PSC), work engagement (WE) and new major depression symptoms emerging over the next 12 months. PSC is the work climate supporting workplace psychological health.

Setting Australian prospective cohort population data from the states of New South Wales, Western Australia and South Australia.

Participants At Time 1, there were 3921 respondents in the sample. Self-employed, casual temporary, unclassified, those with working hours 35 (37% of 2850) and participants with major depression symptoms at Time 1 (6.7% of 1782) were removed. The final sample was a population-based cohort of 1084 full-time Australian employees.

Neuromorphic nanowire networks are found to exhibit neural-like dynamics, including phase transitions and avalanche criticality. Hochstetter and Kuncic et al. show that the dynamical state at the edge-of-chaos is optimal for learning and favours computationally complex information processing tasks.

A quantum microscope obtains signal-to-noise beyond the photodamage limits of conventional microscopy, revealing biological structures within cells that would not otherwise be resolved.

New research suggests that filaments of matter connecting one galaxy to another may be spinning.

Utah is in a drought. Utah is in the need of water. Yes I do live here; for the past 51 yrs. Snowfall has decreased and rainfall is scarce! I’ve started collecting water in gallon jugs, taking less showers. Peeps have been collecting rain in barrels. Utah has not been hit so hard. Wanna go boating, river rafting, kayaking — better check if there is enough water to support your sport.

Utah (ABC4) – Utah’s water supply is not looking good this year. It’s looking so bad that in March, Utah Governor Spencer J. Cox issued an executive order, declaring a state of emergency in Utah.

“People are just exhausted.”

As COVID-19 restrictions loosen across the United States, the hospitality industry — which was walloped by the pandemic — is experiencing a new challenge: too few workers available to address soaring demand for dining out.

A furious debate is underway over what’s behind the labor shortage, which is prompting restaurants to adapt by modernizing with kiosks and digital ordering. Many are biting the bullet and ponying up more in compensation just to attract employees.

Continue reading “‘Exhausted’ restaurants turn to technology to address worker shortages” »

There are certain rules that even the most extreme objects in the universe must obey. A central law for black holes predicts that the area of their event horizons — the boundary beyond which nothing can ever escape — should never shrink. This law is Hawking’s area theorem, named after physicist Stephen Hawking, who derived the theorem in 1971.

Fifty years later, physicists at MIT and elsewhere have now confirmed Hawking’s area theorem for the first time, using observations of gravitational waves. Their results appear today in Physical Review Letters.

Whenever there’s an issue, there’s no support. It’s you against the machine, so you don’t even try.

Amazon’s contract Flex delivery drivers already have to deal with various indignities, and you can now add the fact that they can be hired — and fired — by algorithms, according to a Bloomberg report.

To ensure same-day and other deliveries arrive on time, Amazon uses millions of subcontracted drivers for its Flex delivery program, started in 2015. Drivers sign up via a smartphone app via which they can choose shifts, coordinate deliveries and report problems. The reliance on technology doesn’t end there, though, as they’re also monitored for performance and fired by algorithms with little human intervention.

Continue reading “Amazon is reportedly using algorithms to fire Flex delivery drivers” »